Before I move on, I need to highlight that VMware now uses the term “Legacy FT” to refer to FT implementations pre-dating vSphere 6.0. If required, you can still enable “Legacy FT” by adding vm.uselegacyft to the list of advanced configuration parameters.

Log Bandwidth” which is the network capacity currently in use to replicate changes from the primary to the secondary vm. This can quickly increase when you have multiple (max. 4 vms or 8 vCPUS per host) FT protected vms hence the 10Gbit dedicated network requirement for FT logging.